Molding materials for use in motor vehicle interiors

Abstract

A process for the preparation of fiber-reinforced moldings for motor vehicles wherein the molding comprises a) from 1 to 96.86% by weight of at least one polycondensate, b) from 1 to 12% by weight of at least one particulate graft copolymer whose soft phase has a glass transition temperature below 0° C. and whose median particle size is from 50 to 1000 nm, c) from 1 to 12% by weight of at least one copolymer made from the following monomers, c1) from 50 to 90% by weight of at least one vinylaromatic monomer, and c2) from 10 to 50% by weight of acrylonitrile and/or methacrylonitrile, based in each case on component c, d) from 0 to 20% by weight of e) from 0.01 to 15% by weight of a polycarbonate, f) from 0.01 to 2% by weight of a carbon black, g) from 0 to 12% by weight of a polymer other than component B, h) from 0 to 20% by weight of a polyester other than component A, i) from 0.1 to 10% by weight of conventional additives, such as UV stabilizers, oxidation retarders, lubricants and mold-release agents. Moldings and composites made from these molding compositions are as described as is the use of the molding compositions, the moldings and the composites.

We claim:  
     
       1. A process for the production of fiber-reinforced moldings for motor vehicle interiors comprising the step of thermoforming, extruding injection molding, calandering, blow molding, compression molding, pressure sintering or sintering fiber-reinforced molding composition comprising, based on the total of components A to I, which in total give 100% by weight, 
       a) as component A, from 1 to 96.86% by weight of at least one polyester,  
       b) as component B, from 1 to 12% by weight of at least one particulate graft copolymer whose soft phase has a glass transition temperature below 0° C. and whose median particle size is from 50 to 100 nm,  
       c) as component C, from 1 to 12% by weight of at least one copolymer made from the following monomers, as component C1, from 50 to 90% by weight of at least one vinylaromatic monomer, and  
       c2 as component C2, from 10 to 50% by weight of acrylonitrile and/or methacrylonitrile, based in each case on component C.  
       d) as component D, from 1 to 20% by weight of fibers,  
       e) as component E, from 0.1 to 15% by weight of a polycarbonate,  
       f) as component F, from 0.01 to 2% by weight of a carbon black,  
       g) as component G, from 0 to 12% by weight of a polymer other than component B,  
       h) as component H, from 0 to 20% by weight of a polyester other than component A,  
       i) as component I, from 0.1 to 10% by weight of additives, selected from the group consisting essentially of UV stabilizers, oxidation retarders, lubricants and mold-release agents or combinations thereof, for the production of moldings for motor vehicle interiors.  
     
     
       2. A process as claimed in  claim 1 , wherein the fiber reinforced molding compositions are injection molded. 
     
     
       3. A process as claimed in  claim 1 , wherein the fiber reinforced molding compositions are extruded. 
     
     
       4. A process as claimed in  claim 1 , wherein component A of molding compositions is composed of 
       a1) from 60 to 100% by weight of polybutylene terephthalate and  
       a2) from 0 to 40% by weight of another polyester.  
     
     
       5. A process as claimed in  claim 1 , wherein component B of the molding compositions is composed of 
       b1) from 50 to 90% by weight of a particulate graft base B1 made from the following monomers  
       b11) as component B22, from 75 to 99.9% by weight of a C 1 -C 10 -alkyl acrylate,  
       b12) as component B12, from 0.1 to 10% by weight of at least one polyfunctional monomer having at least two non-conjugated olefinic double bonds, and  
       b13) as component B13, from 0 to 24.9% by weight of one or more other copolymerizable monomers, and  
       b2) from 10 to 50% by weight of a graft B2 grafted onto b1 made from the following monomers  
       b21) as component B21, from 50 to 29% by weight of a vinylaromatic monomer, and  
       b22) as component B22, from 10 to 50% by weight of acrylonitrile and/or methacrylonitrile.  
     
     
       6. A process as claimed in  claim 1 , where the polycarbonate of component E of the molding compositions has a flowability (MVR 300° C./1.2 kp cm 3 /10 min ISO 1133)of from 9to 100. 
     
     
       7. A process as claimed in  claim 1 , where the graft copolymer of component B of the molding compositions contains no butadiene derivative or no isoprene derivative, or neither of these. 
     
     
       8. Moldings for motor vehicle interiors prepared by a process as claimed in  claim 1 . 
     
     
       9. A process for the production of fiber-reinforced moldings for motor vehicle interiors comprising the step of thermoforming, extruding injection molding, calandering, blow molding, compression molding, pressure sintering or sintering fiber-reinforced molding composition comprising, based on the total of components A to I, which in total give 100% by weight, 
       a) as component A, from 1 to 96.86% by weight of at least one polyester,  
       b) as component B, from 1 to 12% by weight of at least one particulate graft copolymer whose soft phase has a glass transition temperature below 0° C. and whose median particle size is from 50 to 100 nm,  
       c) as component C, from 1 to 12% by weight of at least one copolymer made from the following monomers, as component C1, from 50 to 90% by weight of at least one vinylaromatic monomer, and  
       c2 as component C2, from 10 to 50% by weight of acrylonitrile and/or methacrylonitrile, based in each case on component C.  
       d) as component D, from 1 to 20% by weight of fibers,  
       e) as component E, from 0.1 to 15% by weight of a polycarbonate,  
       f) as component F, from 0.01 to 2% by weight of a carbon black,  
       g) as component G, from 0 to 12% by weight of a polymer other than component B,  
       h) as component H, from 0 to 20% by weight of a polyester other than component A,  
       i) as component I, from 0.1 to 10% by weight of additives, selected from the group consisting essentially of UV stabilizers, oxidation retarders, lubricants and mold-release agents or combinations thereof, for the production of moldings for motor vehicle interiors wherein component B of said molding compositions comprise from 10 to 90% by weight of a small-particle graft copolymer with a median particle size from 250 to 1000 nm.  
     
     
       10. Moldings from vehicle interiors comprising the moldings prepared as in  claim 9 .